When additional spar area is included in the certified rig area, what is the likely effect on measured waterline length and displacement?

Answer

The table below shows the result of simple calculations using data for the hull form and additional spar area to determine the required change in waterline length and necessary change in displacement to achieve this. A working spreadhseet will be posted as soon as possible so that actual data can be used to make these estimates.

estimate of change of measured waterline length and ballast weight when adding spar area